Guides
Keep your Mac fast, in plain English.
Practical, no-nonsense guides to what's happening inside your Mac, using the tools already built into macOS.
Why is my Mac running slow? 9 checks that actually help
A practical checklist for a slow Mac: find what’s using your processor and memory, free up storage, trim login items and know when a restart is the fix.
7 min read →
MemoryWhat is memory pressure on a Mac? Green, yellow and red explained
Memory pressure shows how hard macOS is working to give apps memory. Learn what green, yellow and red mean, why “memory used” is misleading, and when more RAM helps.
6 min read →
ProcessorHow to check CPU usage on a Mac (and what the numbers mean)
Four ways to check CPU usage on a Mac, from Activity Monitor to the Dock and Terminal, plus what “over 100%”, kernel_task and WindowServer really mean.
6 min read →
BasicsActivity Monitor explained: every tab, in plain English
A plain-English tour of Activity Monitor on Mac: what the CPU, Memory, Energy, Disk and Network tabs show, which columns matter and how to quit a stuck app.
8 min read →